Improvement in head-blocks for saw-mills



3 Sheets- Sheet 1.

G. ZSGHECH. Head-Block for Saw-Mills. No. 145,712, 7 PatentedDec.l6,1873.

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G. ZSCHECH. flead-Blecks-for Saw-Mills.

N0, I45 ,7]2 Patented Dec. 16,1873.

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UNITED STATES PATENT OFFICE.

GUSTAVUS ZSOHEGH, OF INDIANAPOLIS, INDIANA.

IMPROVEMENT IN HEAD-BLOCKS FOR SAW-MILLS.

Specification forming part of Letters Patent No. 145,712, dated December16, 1873 5 application filed November 8, 1873.

To an whom it may concern:

Be it known that I, GUSTAVUS Zsonnon, of Indianapolis, in the county ofMarion and State of Indiana, have invented a new and val uableImprovement in HeacbBlocks for Saw- Mills; and I do hereby declare thatthe following is a full, clear, and exact description of theconstruction and operation of the same, reference being had to theannexed drawings making a part of this specification, and to the lettersand figures of reference marked thereon.

Figure 1 of the drawings is a representation of a plan view of myhead-block. Figs. 2 and 3 are side views of the same. Fig. 4 is asectional view of the same. Figs. 5, 6, and 7 are detail views of thesame. Fig. 8 is a top-plan view of the same.

This invention has relation to headblocks for sawmills; and it consistsin a certain novel construction of parts, whereby the knees can beadjusted singly or together, and moved either by means of a vibratinglever or by means of a crank-handle, as will be hereinafter explained.

The following is a description of my improvement In the annexeddrawings, A A represent two head-blocks, which will be mounted on alog-carriage in the usual manner, and which have knees B B applied tothem, and moved by means of screws 0 G. On these screws bevelspur-wheels a a are keyed, which engage with bevel-wheels b b on ahorizontal shaft, D. The shaft D is supported by bearings D D extendingout from the ends of the headblocks, and on one of its ends acrank-handle, J, is applied, by turning which the knees B B can berapidly moved back and forth when the wheels c b are in gear. The wheelsI) b are applied on their shaft by means of a feather and groove, sothat they always turn with it, but may be moved endwise on it anddisengaged from the wheels a a. By means of yoked levers c c, which areacted on by springs, (shown in Fig. 7,) the wheels I) b are held in gearwith the wheels at a. E E represent two bearings, on which are secured avertical semicircular guide, E, in which a lever, F, is applied. Thislever F has its bearings on an axis, 3 and is constructed with toothedsegments F F, which are concentric to said axis, and which engage withbeveled spurwheels 9 g on the shaft D. The spur-wheels g g areconstructed with ratchet-teeth e on their backs, which engage withratchet-teeth on the faces of wheels d d on shaft D. The wheels 9 g areapplied on their shaft by means of doubleheaded keys j j, (shown in Fig.4,) which allow these wheels to turn freely on their shaft, but preventthem receivingendwise movement. The ratchet-wheels d d are preventedfrom turning on their shaft by means of the keys j 7', but are allowedto receive endwise movement. The tubular hubs of the ratchet-wheels d dare received into cups H H, and surrounded by springs s s, which act tokeep these wheels in gear with the wheels 9. G G represent pins, whichpass through the wheels 9 g, and bear against the inner faces of thewheels 01 d. These pins G G are acted 011 by means of finger-keys G G,which press the .wheels d d away from wheels 9 g, and thus disengage theratchet-teeth of these wheels.

It will be seen, from the above description, that when the wheels 9 g dd are disengaged the knees B B can be moved rapidly by turning the crankJ also, that either one of the knees can be moved independently of theother. It will also be seen that when the wheels 9 g d d are in gear theknees can be moved by vibrating the lever F.

What I claim as new, and desire to secure by Letters Patent, is

1. The wheels d d g g, applied on the shaft D by means of double-headedkeys j j, the wheels (I d being acted on by springs s s, and the wheels9 g engaging with segments F F on lever F, in combination with saw-millheadblocks, substantially as described.

2. The pins G G and their finger-keys G G in combination with the wheels(1 d g g and the springs s s, substantially as and for the purposesdescribed.

3. The combination and arrangement of the wheels at b, yoked levers 0,wheels at d g g, and segments F F on lever F, and crank J on shaft D, asdescribed.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

GUSTAVUS ZSOHEOH. Witnesses:

CHARLES GoULoN, AnoLrn HARDER.

